#editor {  
    border: 1px solid #ccc;  
    padding: 10px;  
    min-height: 200px;  
    width: 100%;  
    max-width: 600px;  
    margin: 20px auto;  
    font-family: Arial, sans-serif;  
    font-size: 16px;  
    line-height: 1.5;  
}